Former Tottenham boss Harry Redknapp has urged Jose Mourinho to buy this summer.
Spurs were dumped out of the Champions League at the last-16 stage after failing to overturn a 1-0 first-leg deficit against RB Leipzig in Germany, losing 3-0 on the night and 4-0 on aggregate.
They are now winless in their last six, seven points off the top four and were knocked out of the FA Cup on penalties by Norwich last week.
Redknapp, who managed the club between 2008 and 2012, told Sky Sports News: "They've got a bit of work to do to get back to where they were a few years ago.
"The last year or so they have gone backwards quite a way in all honesty - Jose has a big job to do in the summer.
"He needs some good recruitment, a couple of new players and see where they go next year."